Work Items

Work items:
Allow hints from glance to state the presence (or lack of) the agent (like auto_disk_config): DONE
Allow hints from glance to state if cloud-init is present, so certain agent functions should not be performed: INPROGRESS
Test inject network, files and ssh key without agent, with XenAPI driver + config drive: DONE
Ensure user data works with cloud-init while agent configures rest of the image: DONE
Refactor change password on spawn so it is less agent specific in XenAPI: POSTPONED
Using xenstore as an alternative to passing the password back via metadata service: POSTPONED